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Chemoselective Preparation of 1-Iodoalkynes, 1,2-Diiodoalkenes, and 1,1,2-Triiodoalkenes Based on the Oxidative Iodination of Terminal Alkynes
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La iodación de arilo C-H iniciada por KO: una herramienta poderosa para la síntesis de compuestos de alta afinidad
Qinqin Shi1, Siyuan Zhang2, Junxiang Zhang2
1Department of Chemistry, Emory University , Atlanta, Georgia 30322, United States.
Journal of the American Chemical Society
|March 22, 2016
Resumen
Un nuevo método iodiza de manera eficiente los heterociclos con deficiencia de electrones utilizando terciobutoxido de potasio. Este enfoque es clave para crear materiales avanzados de transporte de electrones y células solares orgánicas.
Área de la Ciencia:
- Química orgánica
- Ciencias de los materiales
- Las instalaciones fotovoltaicas
Sus antecedentes:
- Los heterociclos con deficiencia de electrones son componentes cruciales para los materiales electrónicos orgánicos.
- Se necesitan métodos eficientes de funcionalización para sintetizar nuevos materiales con propiedades a medida.
- Las células solares orgánicas requieren aceptores de electrones de alto rendimiento para mejorar la eficiencia de la conversión de energía.
Objetivo del estudio:
- Desarrollar una reacción de iodación eficiente para los heterociclos con deficiencia de electrones.
- Para explorar el mecanismo de la nueva reacción de iodación.
- Demostrar la utilidad de este método en la síntesis de materiales para células solares orgánicas.
Principales métodos:
- Se desarrolló una reacción de iodación eficiente utilizando terciobutoxido de potasio (KO) como iniciador.
- Se investigó el mecanismo de reacción, lo que sugiere una vía de propagación de aniones radicales.
- La metodología se aplicó para sintetizar un nuevo aceptor de perilendiimida-tiazol no fullereno.
Principales resultados:
- La reacción de iodación desarrollada es altamente efectiva para los heterociclos con deficiencia de electrones.
- El aceptador de perilendiimida-tiazol no fullereno sintetizado logró una eficiencia de conversión de energía del 4,5% en células solares orgánicas de heterounión a granel.
- La reacción se produce a través de un probable mecanismo de propagación de aniones radicales.
Conclusiones:
- Se ha establecido un nuevo y eficiente método de iodación para los heterociclos con deficiencia de electrones.
- Esta metodología facilita la síntesis de bloques avanzados para materiales de transporte de electrones.
- La aplicación demostrada en aceptores no fullerenos pone de relieve su potencial para la energía fotovoltaica orgánica de alto rendimiento.
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